Home / 11,555.20-15,941.90-7,578.52

Finding the Fourth Proportional to 11,555.20, 15,941.90 and 7,578.52

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Solution

The fourth proportional to 11,555.20, 15,941.90 and 7,578.52 is: 10,455.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,555.20 : 15,941.90 = 7,578.52 : x
  2. Step 2: Convert to fraction form
    11,555.20/15,941.90 = 7,578.52/x
  3. Step 3: Cross multiply
    11,555.20x = 15,941.90 × 7,578.52
  4. Step 4: Simplify right side
    11,555.20x = 120,816,007.99
  5. Step 5: Solve for x
    x = 120,816,007.99/11,555.20
  6. Step 6: Final answer
    x = 10,455.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.